Active nematics on a substrate: Giant number fluctuations and long-time tails
| Autor: | Sriram Ramaswamy, John Toner, R. Aditi Simha |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
Condensed matter physics Statistical Mechanics (cond-mat.stat-mech) Autocorrelation Dynamics (mechanics) General Physics and Astronomy Equations of motion FOS: Physical sciences Condensed Matter - Soft Condensed Matter 01 natural sciences Standard deviation 010305 fluids & plasmas Liquid crystal Phase (matter) 0103 physical sciences Particle Soft Condensed Matter (cond-mat.soft) Vector field 010306 general physics Condensed Matter - Statistical Mechanics |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| Popis: | We construct the equations of motion for the coupled dynamics of order parameter and concentration for the nematic phase of driven particles on a solid surface, and show that they imply (i) giant number fluctuations, with a standard deviation proportional to the mean and (ii) long-time tails $\sim t^{-d/2}$ in the autocorrelation of the particle velocities in $d$ dimensions despite the absence of a hydrodynamic velocity field. Our predictions can be tested in experiments on aggregates of amoeboid cells as well as on layers of agitated granular matter. Comment: Submitted to Europhys Lett 26 Aug 2002 |
| Databáze: | OpenAIRE |
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